Self-powered curbing machine



FIG. 1 is an enlarged perspective view of a self-powered curbing machineshowing my new design;

FIG. 2 is a side elevational view taken from the left of FIG. 1;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a side elevational view taken from the right of FIG. 1.

The ornamental design for a self-powered curbing machine, substantiallyas shown.